Size & Material : Each cube size is 11.8" x 11.8" x 11.8" (30 x 30 x 30cm), consisting of polyethylene plastic sheet, sturdy metal frame and ABS resin connectors. Bearing Capacity : This cube is designed for storing home items, clothes, books, personal favorite items, etc. Each cube holds up to 15Lbs, so please don't put something too heavy on it. Stability : Whether every cube sheet get well locked decides if you can get a strong structure. Our connector is made of ABS resin, inside is multilayer lock design so it won t easily slides out. So we suggest you lock the sheet in deepest layer to get highest stability.